{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{3}{c}}
\hline\hline
          &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         \\
\hline
1.S#1.T   &   -0.004         &   -0.003         &   -2.374\sym{*}  \\
          &  (0.010)         &  (0.009)         &  (1.237)         \\
\hline
\(N\)     &    10420         &    10420         &    10420         \\
\(R^{2}\) &    0.238         &    0.216         &    0.236         \\
\hline\hline
\end{tabular}
}
